add build to .gitignore
add .idea to .gitignore

add .idea to .gitignore
add image resources
update feature graphics
add cardslib to build.gradle
use cards for events
do NOT show header for single event
improve calendar

add link to calendar
add card header
disable dark theme temporary

disable dark theme temporary, problems with cards
Merge pull request #23 from marunjar/dev_test_cardslib

merge cardslib
use cards for lvas
use cards for grades
add additional info to list header

add avg. grade to grade list header
add total ects to lva list header
use cards for exams
fix npe

fix npe when deleting an event
Merge pull request #24 from marunjar/dev_test_cardslib

merge cardslib
push version

push version to 0.19
fix build

use correct play services (5.0.89)
update screenshots
modify tab design

use slightly bigger and darker font